Boxing Day in the United Kingdom is the day after Christmas Day and falls on December 26. Traditionally, it was a day when employers distributed money, food, cloth (material) or other valuable goods to their employees. In modern times, it is an important day for sporting events and the start of the post-Christmas sales.

Boxing Day is a bank holiday. If Boxing Day falls on a Saturday, the following Monday is a bank holiday. If Christmas Day falls on a Saturday, the following Monday and Tuesday are bank holidays. All schools and many organizations are closed in this period. Some may close for the whole week between Christmas and New Year.

Many stores are open and now start their post-Christmas sales on Boxing Day. This makes December 26 a very important day for many retailers. Many public transport services run on special timetables. Many people travel to visit family or friends in this period, so bus, plane and train services can be very busy.